Yep, you'll need the server_mac.sh script & a custom cfg in your data dir. Your custom cfg just contains the server specifics, a good minsta example is here. Then open the script in a text editor & change "server.cfg" to whatever you've called your cfg. To run it you need to open a terminal, navigate to your data dir & enter: ./server_mac.sh - your server should be running now. If you don't want to keep this terminal open, have a look at GNU Screen.